Perhaps you should try some spelling variations:
subproblem function » subprograms function, problems function
explicit subproblem » exploiting subproblem, explicit problems
parallel explicit » parallel exploring, parallel exact
function function » function functional, functions functional, function dysfunction
function https » functions https, fiction https

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• Performing a fuzzy search may retrieve terms with similar spellings: parallel explicit subproblem function function https~.
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